3 Incredible Hand-powered Devices You Can Make at Home

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If you have an old DC motor lying around, you can use it to create some pretty awesome and useful things around the house. While electric motors take electrical energy and convert it into mechanical energy, they also work in reverse, acting as generators. Once you create a simple generator with the DC motor, you can charge your phone, build a flashlight, or power a fan. Check out all of the projects in the video above.